Crank-pin-truing tool



y 92 l l Patented 00in 3L' )1922.

F. H. SMITH.

CRANK PIN TRUING TOOL.

APPucATioN FILED APR. I

Patented @et lil, i922.. llykiilgz es w FRANKLN HASKLN SMTH, OF BUBKBURNEFT, TEXAS.

CEANKfPN-TRUING: TOOL.

Application filed april 1, 1921.. Serial No. 457,808.

2"@ @ZZ/whom t may cof/tecra.' Y it may be swung back `and forth with the known that l, Fnannnin lineman rollers in contact with the crank pin to be "daiirn, a citizen of the United States, residtrued. i

ng at Burkburnett, in the county of ln Fig. 1 a crank shaft is denoted by a, 60

Il/lichita and State of Texas, have invented a crank arm by and the crank pin to be or discovered certain new and useful mtrued by c, these parts, not forming part of provements in Crank-Fin-Truing rllools, of the tool, being in dotted lines. which the following is a specification, referln the use of the invention the tool is ence being had therein to the accompanyapplied to a crank pin to be trued up as in- 65 io ing drawing. dicated in Fig. 1. The nuts 16 on the bolts This invention has for its object to proare then screwed up until the rollers 17 vide a tool for truingup the crank pin of a are tight against the crank pin c, and the crank shaft when said crank pin may be tool is then oscillated back and forth on the out of true either owing to wear or for crank pin to true it up, the nuts 16 being 70 15 any other reason. To this end the invenfurther tightened if necessary to keep the tion comprises a two-part ring, affording rollers 17 tight against the crank pin.

a raceway, and a two-part circular yoke As the rollers 17 are of hardened steel encircling said ring, the adjacent end faces they will roll down any inequalities on the of said ring being preferably constructed crank pin without appreciably reducing the 75 20 with interlockin@` tongues and Grooves. ln size of the crank in or destro inf1r its D b D y D the raceway afforded by the said ring is a polish, and, in fact, will tend to smooth circular series of rollers, five or more in or polish the surface of the crank pins. number, to surround the crank pin to be The yoke and ring parts will normally be operated upon. The two parts of said yoke slightly separated, as shown in the draw- 80 are held together by bolts which may be ing, to provide for adjustment to bring the screwed up to bring the rollers into tight rollers 1T into tight bearing contact with bearing contact with the crank pin to be the crank .pin to be trued up and to accomtrued up, and the yoke is provided with inodate different sized rollers to tit diflerent a suitable handle by which it may be ossized crank pins. 85

cillated back and forth with the rollers in having thus described my invention l contact with the crank pin to be trued up. claim and desire to secure by Letters Fatln the accompanying drawing Fig. 1 is ent:

a side view of the improved tool with the 1. A tool, for truing up a crank pin, conrollers in place. Fig 2 is a section of the sisting of a yoke comprising two connected 90 same on line 2-2, Fig. 1, with the rollers parts, a two-part ring within said yoke, said removed. Fig. 23 is a detail view of one of ring affording a circular interior raceway, the rollers. a circular series of hardened rollers fitting Refer-ring to the drawing, 12 danoteg two said raceway and adapted to tightly sursemi-circular parts of a yoke the adjacent round the crank pin to be trued up, said 4G end portions of which are provided with yoke being provided with a handle by which ears 13. l/Vthin the y0 e 12 is a. two-part it may be oscillated back and forth on a ring 11i the ends of which are provided with Crank pin.

interlocking tongues lila. rlhe ring parts 2. A tool, for truing up a crank pin, conare preferably grooved, as shown in Fig. sisting of a yoke comprising two connected 2, for the reception of the yoke parts. The parts, a two-part ring within said yoke, cars 12% have holes for the reception of said ring a'lfording a circular interior race bolts 15 having threaded portions for the way, a circular series of hardened rollers reception of nuts 16. `Within the ring 13 fitting said raceway and adapted to tightly is arranged a circular series of rollers 17 surround the crank pin to be trued, said 105 filling theentire raceway afforded by the yoke being provided with a handle, by inner face of said ring. These rollers are which it may be oscillated back and forth preferably of hardened steel with their on a crank pin, and with diametrically opends slightly rounded and the ring parts posite ears, and bolts connecting said ears.

are preferably provided with flanges 18 3. A tool, for truing up a crank pin, con- 110 55 to retain the rollers within the yoke. The sisting of a yoke comprising two connected yoke is provided with a handle 19 by which parts, a two-part ring within said yoke,

surround the eranl `pin to be trued up, said yoke being provided with a handle, by

' which it may be oscillated back and forth on a crank pin, and with diametrically opposite ears, and bolts connecting said ears, Jche adjacent end portions of said ring having ine'rlooking tongues. V

4. A tool; for truing up alcran-k pin, con sisting of a yoke comprising two adjustably oonneo'ted parts, va two-part yring Within said yoke, said vvring affording a circular interior raceway the outer edges of Which lare provided Withflanges, a Circular series of hardened rollers adapted 'to tightly be trued up, a handle by and forth on a crank pin.

In testimony whereof I ture.

FRANKLIN HASKLIN f SMITH.

fitting said raceway and surround a crank pin to said yoke being provided with aliiX Iny signa- Which-it may be osoillated back 20 

